feat(battle-engine): full Unity/VFX/god-object shims + expanded copy closure (2570 files)

Authored Unity primitive/object-model shim, VFX layer (control-flow-preserving, InstantVfx never invokes its action -- headless suppression), god-object stubs (GameMgr/EffectMgr/UIManager with faithfully-extracted nested enums), View/UI/Touch tree, LitJson+BetterList+Tuple copied, third-party stubs. Discovered Roslyn header-error masking: fixing class-header type errors unmasks body references, so the true copy closure is ~2570 files (was 782 under masking). Errors: masked-25720 -> 268; our shim files compile clean. Remaining: ~50 residual shim/external types, 24 NGUI UI-base overrides, static-type fixes, plus likely 1-2 more unmask waves.

SVSim.BattleEngine/Engine/RoomTwoPickBeforeBattleInfo.cs

@@ -0,0 +1,50 @@
+using System.Collections.Generic;
+using Wizard.Scripts.Network.Data.TableData.Arena.TwoPick;
+
+public class RoomTwoPickBeforeBattleInfo
+{
+	public Deck receiveDeck { get; private set; }
+
+	public RoomTwoPickBeforeBattleInfo()
+	{
+		receiveDeck = new Deck();
+		receiveDeck.cardIds = new int[0];
+	}
+
+	public void ReceiveBackDraftCardIdList(List<int> list)
+	{
+		receiveDeck.cardIds = list.ToArray();
+	}
+
+	public void ReceiveBackDraftCharaId(int id)
+	{
+		receiveDeck.skinId = id;
+	}
+
+	public void SetClassId(int classId)
+	{
+		receiveDeck.classId = classId;
+	}
+
+	public void SelfInfoClasIdCopyTwoPickDraftData()
+	{
+		SetClassId(GameMgr.GetIns().GetNetworkUserInfoData().GetSelfClassId());
+	}
+
+	public void SetSelfClassIdTwoPickDraftData(int classId)
+	{
+		SetClassId(classId);
+	}
+
+	public void SelfInfoDeckCopyTwoPickDraftData()
+	{
+		List<CardDataModel> selfDeck = GameMgr.GetIns().GetNetworkUserInfoData().GetSelfDeck();
+		List<int> list = new List<int>(selfDeck.Count);
+		foreach (CardDataModel item in selfDeck)
+		{
+			list.Add(item.CardId);
+		}
+		ReceiveBackDraftCardIdList(list);
+		ReceiveBackDraftCharaId(GameMgr.GetIns().GetNetworkUserInfoData().GetSelfCharaId());
+	}
+}